From dd70f09fcec801863d919fceaac906a7957633a5 Mon Sep 17 00:00:00 2001
From: Vincent Lejeune <vljn@ovi.com>
Date: Tue, 16 Sep 2014 17:17:56 +0200
Subject: [PATCH] Revert "Apply patch from
 http://sourceforge.net/p/glew/patches/40/"

This reverts commit ef5039c02fe1f1f881b1ce827298c8eb9158dd81.
---
 lib/glew/src/glew.c | 100 +++++---------------------------------------
 1 file changed, 10 insertions(+), 90 deletions(-)

diff --git a/lib/glew/src/glew.c b/lib/glew/src/glew.c
index aba91099b..f8df0d758 100644
--- a/lib/glew/src/glew.c
+++ b/lib/glew/src/glew.c
@@ -296,30 +296,6 @@ static GLboolean _glewStrSame3 (GLubyte** a, GLuint* na, const GLubyte* b, GLuin
   return GL_FALSE;
 }
 
-#include <string.h>
-#include <stdlib.h>
-
-/* A simple open addressing hashset for extensions on OpenGL 3+. */
-static const char ** ext_hashset = NULL;
-size_t ext_hashset_size = 0;
-
-static unsigned hash_string(const char * key)
-{
-  unsigned hash = 0;
-  unsigned i = 0;
-  for (; i < strlen(key); ++i)
-  {
-    hash += key[i];
-    hash += (hash << 10);
-    hash ^= (hash >> 6);
-  }
-  hash += (hash << 3);
-  hash ^= (hash >> 11);
-  hash += (hash << 15);
-
-  return hash;
-}
-
 /*
  * Search for name in the extensions string. Use of strstr()
  * is not sufficient because extension names can be prefixes of
@@ -328,37 +304,14 @@ static unsigned hash_string(const char * key)
  */
 static GLboolean _glewSearchExtension (const char* name, const GLubyte *start, const GLubyte *end)
 {
-  if (ext_hashset != NULL)
+  const GLubyte* p;
+  GLuint len = _glewStrLen((const GLubyte*)name);
+  p = start;
+  while (p < end)
   {
-    unsigned hash = hash_string(name);
-
-    /*
-     * As the hashset is bigger than the number of extensions
-     * this will eventually break.
-     */
-    while(1)
-    {
-        unsigned index = hash % ext_hashset_size;
-        if (ext_hashset[index] == NULL)
-            break;
-
-        if (!strcmp(ext_hashset[index], name))
-            return GL_TRUE;
-
-        hash++;
-    }
-  }
-  else
-  {
-    const GLubyte* p;
-    GLuint len = _glewStrLen((const GLubyte*)name);
-    p = start;
-    while (p < end)
-    {
-      GLuint n = _glewStrCLen(p, ' ');
-      if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
-      p += n+1;
-    }
+    GLuint n = _glewStrCLen(p, ' ');
+    if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
+    p += n+1;
   }
   return GL_FALSE;
 }
@@ -10099,10 +10052,7 @@ static GLboolean _glewInit_GL_WIN_swap_hint (GLEW_CONTEXT_ARG_DEF_INIT)
 /* ------------------------------------------------------------------------- */
 
 GLboolean GLEWAPIENTRY glewGetExtension (const char* name)
-{
-  if (ext_hashset != NULL)
-    return _glewSearchExtension(name, NULL, NULL);
-
+{    
   const GLubyte* start;
   const GLubyte* end;
   start = (const GLubyte*)glGetString(GL_EXTENSIONS);
@@ -10164,39 +10114,9 @@ GLenum GLEWAPIENTRY glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
     GLEW_VERSION_1_2   = GLEW_VERSION_1_2_1 == GL_TRUE || ( major == 1 && minor >= 2 ) ? GL_TRUE : GL_FALSE;
     GLEW_VERSION_1_1   = GLEW_VERSION_1_2   == GL_TRUE || ( major == 1 && minor >= 1 ) ? GL_TRUE : GL_FALSE;
   }
-  
-  if (major >= 3) /* glGetString method is deprecated */
-  {
-    GLint n, i;
-    glGetIntegerv(GL_NUM_EXTENSIONS, &n);
-    glGetStringi = (PFNGLGETSTRINGIPROC)glewGetProcAddress((const GLubyte*)"glGetStringi");
-
-    free(ext_hashset); /* In case we get called a second time. */
-
-    ext_hashset_size = (n * 3) / 2;
-    ext_hashset = calloc(ext_hashset_size, sizeof(const char *));
-    for (i = 0; i < n; ++i)
-    {
-      const char * extension;
-      unsigned hash;
- 
-      extension = (const char *)glGetStringi(GL_EXTENSIONS, i);
-      hash = hash_string(extension);
-
-      while(ext_hashset[hash % ext_hashset_size] != NULL)
-        hash++;
-        
-      ext_hashset[hash % ext_hashset_size] = extension;
-    }
-
-    extStart = 0;
-  }
-  else
-  {
-    /* query opengl extensions string */
-    extStart = glGetString(GL_EXTENSIONS);
-  }
 
+  /* query opengl extensions string */
+  extStart = glGetString(GL_EXTENSIONS);
   if (extStart == 0)
     extStart = (const GLubyte*)"";
   extEnd = extStart + _glewStrLen(extStart);